yesno.c revision 251843 
1/*
2 *  $Id: yesno.c,v 1.57 2012/12/01 01:48:21 tom Exp $
3 *
4 *  yesno.c -- implements the yes/no box
5 *
6 *  Copyright 1999-2011,2012	Thomas E. Dickey
7 *
8 *  This program is free software; you can redistribute it and/or modify
9 *  it under the terms of the GNU Lesser General Public License, version 2.1
10 *  as published by the Free Software Foundation.
11 *
12 *  This program is distributed in the hope that it will be useful, but
13 *  WITHOUT ANY WARRANTY; without even the implied warranty of
14 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 *  Lesser General Public License for more details.
16 *
17 *  You should have received a copy of the GNU Lesser General Public
18 *  License along with this program; if not, write to
19 *	Free Software Foundation, Inc.
20 *	51 Franklin St., Fifth Floor
21 *	Boston, MA 02110, USA.
22 *
23 *  An earlier version of this program lists as authors
24 *	Savio Lam (lam836@cs.cuhk.hk)
25 */
26
27#include <dialog.h>
28#include <dlg_keys.h>
29
30/*
31 * Display a dialog box with two buttons - Yes and No.
32 */
33int
34dialog_yesno(const char *title, const char *cprompt, int height, int width)
35{
36    /* *INDENT-OFF* */
37    static DLG_KEYS_BINDING binding[] = {
38	HELPKEY_BINDINGS,
39	ENTERKEY_BINDINGS,
40	TRAVERSE_BINDINGS,
41	SCROLLKEY_BINDINGS,
42	END_KEYS_BINDING
43    };
44    /* *INDENT-ON* */
45
46    int x, y;
47    int key = 0, fkey;
48    int code;
49    int button = dlg_default_button();
50    WINDOW *dialog = 0;
51    int result = DLG_EXIT_UNKNOWN;
52    char *prompt = dlg_strclone(cprompt);
53    const char **buttons = dlg_yes_labels();
54    int min_width = 25;
55    bool show = TRUE;
56    int page, last = 0, offset = 0;
57
58#ifdef KEY_RESIZE
59    int req_high = height;
60    int req_wide = width;
61  restart:
62#endif
63
64    dlg_tab_correct_str(prompt);
65    dlg_button_layout(buttons, &min_width);
66    dlg_auto_size(title, prompt, &height, &width, 2, min_width);
67    dlg_print_size(height, width);
68    dlg_ctl_size(height, width);
69
70    x = dlg_box_x_ordinate(width);
71    y = dlg_box_y_ordinate(height);
72
73#ifdef KEY_RESIZE
74    if (dialog != 0)
75	dlg_move_window(dialog, height, width, y, x);
76    else
77#endif
78    {
79	dialog = dlg_new_window(height, width, y, x);
80	dlg_register_window(dialog, "yesno", binding);
81	dlg_register_buttons(dialog, "yesno", buttons);
82    }
83
84    dlg_draw_box2(dialog, 0, 0, height, width, dialog_attr, border_attr, border2_attr);
85    dlg_draw_bottom_box2(dialog, border_attr, border2_attr, dialog_attr);
86    dlg_draw_title(dialog, title);
87    dlg_draw_helpline(dialog, FALSE);
88
89    (void) wattrset(dialog, dialog_attr);
90
91    page = height - (1 + 3 * MARGIN);
92    dlg_draw_buttons(dialog,
93		     height - 2 * MARGIN, 0,
94		     buttons, button, FALSE, width);
95
96    while (result == DLG_EXIT_UNKNOWN) {
97	if (show) {
98	    last = dlg_print_scrolled(dialog, prompt, offset,
99				      page, width, TRUE);
100	    dlg_trace_win(dialog);
101	    show = FALSE;
102	}
103	key = dlg_mouse_wgetch(dialog, &fkey);
104	if (dlg_result_key(key, fkey, &result))
105	    break;
106	if ((code = dlg_char_to_button(key, buttons)) >= 0) {
107	    result = dlg_ok_buttoncode(code);
108	    break;
109	}
110	/* handle function keys */
111	if (fkey) {
112	    switch (key) {
113	    case DLGK_FIELD_NEXT:
114		button = dlg_next_button(buttons, button);
115		if (button < 0)
116		    button = 0;
117		dlg_draw_buttons(dialog,
118				 height - 2, 0,
119				 buttons, button,
120				 FALSE, width);
121		break;
122	    case DLGK_FIELD_PREV:
123		button = dlg_prev_button(buttons, button);
124		if (button < 0)
125		    button = 0;
126		dlg_draw_buttons(dialog,
127				 height - 2, 0,
128				 buttons, button,
129				 FALSE, width);
130		break;
131	    case DLGK_ENTER:
132		result = dlg_yes_buttoncode(button);
133		break;
134#ifdef KEY_RESIZE
135	    case KEY_RESIZE:
136		dlg_clear();
137		height = req_high;
138		width = req_wide;
139		goto restart;
140#endif
141	    default:
142		if (is_DLGK_MOUSE(key)) {
143		    result = dlg_yes_buttoncode(key - M_EVENT);
144		    if (result < 0)
145			result = DLG_EXIT_OK;
146		} else if (dlg_check_scrolled(key, last, page,
147					      &show, &offset) != 0) {
148		    beep();
149		}
150		break;
151	    }
152	} else {
153	    beep();
154	}
155    }
156
157    dlg_del_window(dialog);
158    dlg_mouse_free_regions();
159    free(prompt);
160    return result;
161}
162